Fujitsu 8 Game 9 / Solution

Sub-page of Fujitsu8Game9

After White fills the dame (marked):

[Diagram]

Reinforcement is needed

Black has to play at 1 to prevent seki. Black can only avoid seki by ignoring a ko threat, which costs too much to be acceptable.

[Diagram]

If Black does not reinforce

Black can't afford to play the ko at a, and has to settle for a seki at b.


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(OC) 2004 the Authors, published under the OpenContent License V1.0.
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